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Item _cell.volume

Description

              Cell volume V in angstroms cubed.

               V = a b c (1 - cos^2^~alpha~ - cos^2^~beta~ - cos^2^~gamma~
                          + 2 cos~alpha~ cos~beta~ cos~gamma~)^1/2^

               a     = _cell.length_a
               b     = _cell.length_b
               c     = _cell.length_c
               alpha = _cell.angle_alpha
               beta  = _cell.angle_beta
               gamma = _cell.angle_gamma